Glass-mold



' s HIPKINS Jr 2 salem-sheet 1.

n GlassMold'. 'Y NQ. 224.433'. Patented Feb. 1o, 18801.

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UNITED STATES `PATENT f FEICE.,

STEPHEN HIPKINs, JE.,"oEMAET1Ns EEEEY, OHIO.

GLASS;

SPECIFICATION forming part To 'all whom it may concern .j n A Be it known that I, STEPHEN HIPKINS, J r., of Martins Ferry, in the, county of, Belmont and State of Ohio, have invented certain new and useful Improvements'lin Glass-Molds, of which the following is a specification.

In the manufacture of Vglassware I use four molds and corresponding Apressing-plungers,v operating in pairs by equalizing-levers, and a cross equalizing-beam Vmonntedin a centrally#` located column carried by the .plunger-head,

ferent patterns at one stroke of thel pressing machine. Y

In molds of this kind the working-joints for the plungers in the guide-plate are constantly subjected to a cuttingraction of the glass to such an extent as to produce an imperfect or X.

irregular edge of the moldedvarticle;`and to avoid this objection, and to prevent such cut, tingaction, I provide the underiside of the guide-plate at the several plunger-ways` withy separate joint-rings, adapted to form coversft'o the molds around the' plungers, and secured in a manner to allowof their removal and re- A placement when joint-worn, thus avoiding theexpense'in having to replaceV thel guide-plate as an'entirety, which is a matter of greatiinportance and advantage in glass-molds. l

These joint-rin gs 'aresecured in a manner to ada-pt them for expansion and contraction'under the action of the heat; and' to prevent their warping and cause 'them to maintain a flush ttin g with the molds they are provided with a re-enforcing face collar or swell, which bounds the eye or ring joint, each mold for Vthis purpose being' provided with an annular recessed seat, the counterpart of and which receives the said ring-collar, and forms a perfect join- MOLD.

of Lettersl regent I'r' .224.,433, dated February 1o, 1880. Applicationlled December-1, 1879. y *i l v l and uguide in seating the ring-plate for the action ofthe plungers,`while at the saine time l maintaining the perfect matching of the plun-` gerswith the molds. p

.The molds may be independently seated in recesses in-the bed-plate, to allow of their separate removal to discharge the molded article ;v A v or they may bed-plate.

v In connectionv with plungers .controlled in )pairs by: equalizing fulcrum bearings, each Y plunger is provided with a collar-stop acting bextures with or formedin said directly upon the guide-plate to limit its projection into'the mold, whereby perfect articles are, pressed in all the moldsaor in such only in to `whichthe molten glass may haye been deposited, for whilethe four plungers a'recon;`r

nected for .co-operative action. from alsingle centralV point, the `one 'yielding' in harmony with another to adapt themselves to any ine-V qualities of the amount of material in the molds, yet neither can descend into the mold below the proper point. y

`The ,adjustment of the pivoted equalizingbeam must besuch as togive the proper equal Y bearing upon` the plunger-levers at all times and from a point '.-equidistant from vall the plungers, and with sufficient playto compensate for the expansion of the parts inoperating the plungers. f

. Referring :to the a glass-mold embracing my invention 5, Fig.'2, apartial ,section ofthe same on the line x .r of Fig. `1 Fig. ,a top view of the'same; Fig. 4, the'under side of the guide-plate, showing the removable joint-rings; and Fig. 5, a section of one ofthemolds and the collar-joint forming ring of theguideplate.

n accompanying drawings, VFigure l represents -a view, 1n perspective, of

The molds@ are'` separately seated in holdp ing-recesses'bri'n the bed-plate, and they may be of thesame or of one or'more different pat- Y terns,`1as their separately seating allows of suchnhangesandof their separate handling `to: discharge the molded articles. They may,

however, Vbe tix'tures with `the bed-plate` or y formed therein.

ed for conjoint action, carried by a plungerhead, d, and operating through holesin a guideplate, c, which carries covering-rings for the Iulse four such molds with plungers c, adapt- IOO molds, and which rings form guides and wearing-joints for theplun gers operating therewith.

The plunger-head is connected to the press by separate columns f j', or in any suitable manner. rIhe plungers, while being adapted for conjoint action, are also adapted for simultaneous action by means of levers g g, pivoted to the guidestems c of the plungers above their opera-ting head, and an equalizing-beam, h, pivotcd to a central column, i, of such head in such manner as to form fulcrum-pointsjj for the plunger-connecting levers. These fulcrum-points are equidistant from the plungerpivots and from the central pivot, 7c, of the beam h, so that from this central point each plunger is controlled, and thereby allows them all to act equally when the same quantity of glass is placed in each mold, or one or more of the plungers may adapt itself to any inequalities ofthe quantity of glass which might be in their respective molds; but to whatever extent this unequal action of the plungers, the pressure is rendered equal from the central fulcrum, making a sort of system of connections, each having the same working relation to a point common to them all, thereby rendering it practicable to produce four articles of glassware at one stroke of the press.

I do not use the guide-plate to form a cover and wearing-joints for the plungers, as heretofore, but 1 provide said guide-plate with separate joint-rings I, adapted to form the wearin g-jolnt for each plunger and a cover for cach mold around the plunger, and by this means save the ring-plate from being cut out at the plun gerjoints by the action of the glass. These supplemental joint-rings are secured vto the under side of the guide-plate, so as to allow of their removal and replacement by new ones, and to admit of expansion and contraction froln the heat, such securing means being by screws m and slots n, or otherwise. These supplemental joint-rings are re-enforced by a face swell or collar, r, which forms, in fact, the plunger wearing-joint and the cover forthe mold, with which it maintains a iiush itting within an annular recessed seat, s, the counterpart of said swell or collar. The increased thickness given the jointring by the collar or swell also serves to brace the ring against warping, and keeps it in working condition for a much longer time than could be possible without such re-enforcement. It also serves to prevent the guideplate and plungers from being moved from matching positions with the molds.

To insure the perfect molding of the articles, even, from any cause, should some of the molds be left empty, the plungers are provided with collars t, placed to bear upon the guide-plate so as to limit their projection into the molds; and as such limitation is effected by the direct intervention of the guide-plate, and as the relation of the latter to the molds is not liable to variation, the operation in this particular is effected with precision.

Operating molding-plum gers simultaneously by a single carrying-head, in connection with a yielding device for each separate and distinct plunger, to provide for the excess of material in some of the molds, and for the completion of the article in the mold having less material, is not new; and in such molds stops have been used, in connection with the plunger-head, to limit the descent of the plungers against the action ofseparate and independent yielding springs.

The mold is formed of east-iron, steel, or other suitable metal, and the guide-stems of the plungers pass through openings in the base-plate of the plunger-head.

The bearing-points jj of the equalizing-lever may be made by connections in any suitable manner that will give the proper action of the plungers.

I claiml. Aglass-mold having four molding-cavities and a corresponding number of pressingplungers operated simultaneously at each stroke of the press, in combination with a pressing and yielding device consisting of levers connecting the plungers in pairs and an equalizing-beam pivoted upon the plungerhead and adapted t0 operate upon thc connected plungcrs from a central point, substantially as and for the purpose herein set forth.

2. In a glass-mold, the combination, with the guide-plaie, of joint-rings for the plungers, secured to the under side of said guideplate and adapted for removal and replacement, substantially as and for the purpose herein set forth.

3. In a glass-mold, the combination, with the guide-plate, of collar joint-rings for the plungers, having slots for their securingscrews, whereby provision is made for the expansion and contraction of said joint-ring.

4. The plungers, their connecting-levers, and the equalizing-beam, forming a pressing and a yielding device for the plungers, in combination with collar-stops on said plungers adapted to bear directlyY upon the guideplate, substantially in the manner and for the purpose herein set forth.

5. The four molds connected for conjoint action, and controlled in such action from a single central point on the plunger-head, the ring-plate provided with supplemental jointrings, and the molds adapted to receive said joint-rings as covers thereto, all constructed for operation substantially as herein set forth.

In testimony whereof I have'hereunto set my hand.

STEPHEN HLPKINS, JR.

Witnesses:

J. F. MILLER, JAMES W. SHIPMAN.

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